Kohler COMMAND CV17-745 Service Manual page 80

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Section 5B
EFI Fuel System
Keep in mind that EFI-related problems are more often
caused by the wiring harness or connections than by
the EFI components. Even small amounts of corrosion
or oxidation on the terminals can interfere with the
milliamp currents used in system operation.
Cleaning the connectors and grounds will solve
problems in many cases. In an emergency situation,
simply disconnecting and reconnecting the connectors
may clean up the contacts enough to restore operation,
at least temporarily.
"24 Pin" (MSE 1.0) Plastic-Cased ECU Systems
Pin #
1 Permanent Battery Voltage
Switched Ignition Voltage
2
3 Safety Switch
4 Throttle Position Sensor (TPS) and Temperature Sensor Ground
Not Used
5
6 Oil Temperature Sensor Input
7 Not Used
8 Throttle Position Sensor (TPS) Input
9 Speed Sensor Input
Speed Sensor Ground
10
11 Oxygen Sensor Input
12 Not Used (Oxygen Sensor Ground if needed)
Diagnostic Line
13
14 Throttle Position Supply Voltage
15 Battery Ground
16 Injector 1 Output
17 Injector 2 Output
Main Relay Output
18
19 Malfunction Indicator Light (MIL)
20 Not Used (Tach Output if needed)
Not Used
21
22 Ignition Coil #1 Output
23 Ignition Coil #2 Output
24 TPS Initialization Terminal
5B.26
If a fault code indicates a problem with an electrical
component, disconnect the ECU connector and test for
continuity between the component connector terminals
and the corresponding terminals in the ECU connector
using an ohmmeter. Little or no resistance should be
measured, indicating that the wiring of that particular
circuit is OK. An illustrated listing of numerical terminal
locations, for each style of ECU connector is provided
on pages 5B.26 and 5B.29.
NOTE: When performing voltage or continuity tests,
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avoid putting excessive pressure on or against
the connector pins. Flat pin probes are
recommended for testing to avoid spreading or
bending the terminals.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24